A drilling device for sampling seabed mineral deposits in extreme environments

Abstract

The present invention discloses a subsea mineral sampling drilling device under extreme environment, including a power mechanism, a gear transmission mechanism, a drill barrel and an ore conveying mechanism, wherein the gear transmission mechanism includes a gear box and a driving gear and a driven gear arranged in the gear box. The output end of the power mechanism is connected with a driving gear key, and the drill barrel is arranged vertically below the gear box and is fixedly connected with the driven gear, and the driven gear drives the drill barrel to rotate around its central axis. A plurality of picks are arranged at the lower end of the drill barrel, and the ore conveying mechanism is arranged on the inner side of the lower part of the drill barrel, including a hob support and two shredding hobs, and the hob support has a conveying channel. The two shredding hobs are arranged relatively parallel at the upper end of the conveying channel, and synchronously rotate to continuously convey the crushed ore upward. The gear transmission mechanism of the present invention has good internal sealing, effectively avoids seawater corrosion and gear oil leakage, has extremely low destructiveness to the subsea environment, has a long service life, and performs two crushings after sampling the subsea mineral, which is convenient for ore sample transportation and has high drilling sampling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of marine drilling equipment, and in particular to a seabed mineral sampling drilling device under extreme conditions. Background Art

[0002] In the 21st century, when global land resources are increasingly scarce, humans have set their sights on the vast ocean. The ocean area accounts for about 71% of the entire earth, which is about 2.5 times the land area. The vast ocean bottom is rich in mineral resources. After exploration by geologists, some solid resources such as methane hydrate, coastal sand mines, cobalt-rich crusts, polymetallic nodules, polymetallic sulfides and other resources are far more than land. The huge mining potential of seabed minerals can well cope with the problem of resource shortage in today's world. However, the seabed terrain is complex, with not only fine sand and soft mud and hard rock formations, but also due to the flow of seawater, the machine may encounter complex extreme marine environments such as internal waves, waves, and ocean currents when working.

[0003] Whether studying seabed geological structures, conducting marine exploration, or engaging in continental shelf engineering geological surveys, seabed sampling is indispensable. At the same time, the internal structure of existing seabed mineral sampling devices is easily corroded by seawater, resulting in a short service life, great damage to the seabed environment, the sampled mineral particles are large and inconvenient to transport, and the seabed sampling depth is shallow. These technical bottlenecks require further improvement and enhancement of existing technologies. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to propose a seabed mineral sampling drilling device for extreme environments, so as to solve the problems that the existing seabed mineral sampling devices are easily corroded by seawater, resulting in a short service life, great damage to the seabed environment, the sampled mineral particles are large and inconvenient to transport, and the seabed sampling depth is shallow.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A seabed mineral sampling drilling device for extreme environments includes a power mechanism, a gear transmission mechanism, a drill tube and an ore conveying mechanism. The gear transmission mechanism includes a gear box, a driving gear and a driven gear. The driving and driven gears are arranged in the gear box and mesh with each other.

[0007] The power mechanism is located on the upper side of the gear box, and its output end is key-connected with the driving gear. The power mechanism drives the driven gear to rotate through the driving gear.

[0008] The drill barrel is arranged vertically below the other side of the gear box, and its upper end passes through the driven gear and extends to the outside of the gear box. The upper part of the drill barrel is fixedly connected to the driven gear, and the driven gear drives the drill barrel to rotate around its central axis.

[0009] The lower end of the drill tube is regularly arranged with a plurality of cutting teeth for crushing ore. The ore conveying mechanism is arranged on the inner side of the lower part of the drill tube, which includes a roller cutter support and two tearing roller cutters. The roller cutter support has a conveying channel which passes through from top to bottom.

[0010] The two shredding rollers are arranged relatively parallel to each other at the upper end of the conveying channel. The two shredding rollers rotate synchronously to convey the crushed ore at the lower part of the drill tube upward continuously.

[0011] Furthermore, the gear box includes a top plate, a bottom plate and an annular side plate, and the top plate and the bottom plate are fixedly connected to the annular side plate to form a whole.

[0012] A lower mounting hole is opened on the bottom plate, an upper mounting hole corresponding to the position of the lower mounting hole is opened on the top plate, a flange seat is fixed on the lower surface of the bottom plate, the flange seat is coaxially arranged with the lower mounting hole, and its outer side wall is fixedly welded to the bottom plate through a plurality of ribs.

[0013] Furthermore, an annular support is provided on the inner side of the lower mounting hole, and the outer side of the annular support is fixedly connected to the bottom plate.

[0014] The driven gear is an outer gear ring, which is located above the annular support.

[0015] A slewing bearing is arranged between the annular support and the driven gear, the inner ring of the slewing bearing is fixedly connected to the annular support, and the driven gear is fixedly connected to the outer ring of the slewing bearing.

[0016] Furthermore, a connecting sleeve is provided between the driven gear and the drill barrel. The connecting sleeve is a cylindrical structure, which is sleeved on the outer side of the upper part of the drill barrel and fixedly connected thereto.

[0017] The outer wall of the connecting sleeve is fixedly connected to the inner side of the driven gear through a plurality of bolts arranged in a ring shape, and the driven gear drives the drill tube to rotate through the connecting sleeve.

[0018] A first sealing ring is arranged on the inner side of the annular support, and the lower part of the connecting sleeve is rotatably sealed with the gear box through the first sealing ring.

[0019] Furthermore, a first bearing seat is arranged on the inner side of the upper mounting hole, and the outer side of the first bearing seat is fixedly connected to the top plate as a whole.

[0020] The upper outer wall of the connecting sleeve is rotatably matched with the gear box through a deep groove ball bearing. A first annular end cover is arranged above the first bearing seat. The first end cover is fixedly connected to the first bearing seat and sealed therewith through a first O-ring.

[0021] A second sealing ring is arranged on the inner side of the first end cover, and the upper part of the connecting sleeve is rotatably sealed with the gear box through the second sealing ring.

[0022] Furthermore, a plurality of rectangular flat keys are provided on the circumferential outer wall of the upper portion of the drill tube, and the plurality of flat keys are evenly arranged on a circumference with the axis of the drill tube as the center.

[0023] The inner side wall of the connecting sleeve is provided with key slots equal in number to the flat keys and corresponding in position, each flat key is located in the corresponding key slot, and the drill tube is fixedly connected to the connecting sleeve at the position of each flat key by a group of bolts.

[0024] Furthermore, a planar three-pronged pick mounting seat is provided on the inner side of the lower end surface of the drill barrel, and the three ends of the pick mounting seat are fixedly connected to the inner wall of the drill barrel as a whole.

[0025] A part of the picks are evenly mounted on the lower end surface of the drill tube in a ring shape, and another part of the picks are regularly distributed on the pick mounting seat.

[0026] Furthermore, the circumferential outer wall of the roller cutter support matches the inner wall of the drill barrel, and the roller cutter support is fixedly connected to the drill barrel by bolts.

[0027] The conveying channel is in a trumpet shape which is narrow at the top and wide at the bottom. The upper end of the conveying channel is square and the lower end thereof is round. The bottoms of the two tearing rollers are close to the upper end of the conveying channel.

[0028] The shredding roller comprises a cutter shaft and a group of blades, wherein the group of blades comprises a plurality of blades arranged at intervals along the axial direction of the cutter shaft, each blade is fixedly connected to the cutter shaft where it is located, and the two groups of blades are arranged alternately in sequence.

[0029] The two ends of the cutter shaft respectively penetrate into the roller cutter support and rotate with it. One end of each cutter shaft is respectively connected to a motor enclosed in the roller cutter support, and the motor drives the two tearing roller cutters to rotate synchronously.

[0030] Furthermore, there are two driving gears, which are respectively arranged outside the circumference of the driven gear, and the axles of the driving gears are rotatably sealed with the gear box.

[0031] A power mechanism is provided above each driving gear, and the power mechanism includes a hydraulic motor, a planetary gear reducer and a coupling arranged in sequence from top to bottom, and the upper end of the axle of the driving gear passes through the top of the gear box.

[0032] The output end of the hydraulic motor is connected to the input end of the planetary gear reducer, and the output end of the planetary gear reducer is connected to the upper end of the axle of the driving gear through the coupling.

[0033] Furthermore, the top and bottom of the gear box are respectively provided with second bearing seats corresponding to the position of the driving gear, and the inner side of each second bearing seat is rotationally matched with the axle of the driving gear through a cylindrical roller bearing.

[0034] A sealing cover is fixed to the bottom of the second bearing seat located below, and a third sealing ring is arranged between the sealing cover and the second bearing seat located below.

[0035] A second annular end cover is fixed on the top of the second bearing seat, the inner side of the second end cover is movably sealed with the axle of the driving gear through a lip seal ring, and the bottom of the second end cover is sealed with the second bearing seat located above through a second O-ring.

[0036] By adopting the above technical scheme, the beneficial technical effect of the present invention is: through the cooperation between the gear and the drive sleeve, the internal sealing of the gear transmission mechanism of the present invention is good, which can effectively avoid seawater corrosion and gear oil leakage, has extremely low destructiveness to the seabed environment, and has a long service life. It runs stably and reliably, transmits force to the cutting teeth at the lower end of the drill barrel, excavates the seabed mineral deposits, and performs preliminary crushing of the rocks, and then uses the crushing roller to crush the rocks for the second time, thereby reducing its workload, being simple to operate, having a high degree of automation, and having a high drilling sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic structural diagram of a seabed mineral sampling drilling device in an extreme environment according to the present invention.

[0038] Figure 2 It is a side structural diagram of a seabed mineral sampling drilling device in an extreme environment according to the present invention.

[0039] Figure 3 yes Figure 2 A structural cross-sectional view of the present invention taken along the AA direction.

[0040] Figure 4 It is a schematic diagram of a certain part of the structure of the present invention, showing the driven gear.

[0041] Figure 5 A partial cross-sectional view of a seabed mineral sampling drilling device in an extreme environment according to the present invention

[0042] Figure 6 It is a schematic diagram of the partial combined structure of the present invention, showing the driving and driven gears, the drill tube and the connecting sleeve.

[0043] Figure 7 yes Figure 5 A schematic diagram of a certain part of the structure shows a connecting sleeve.

[0044] Figure 8 It is another structural schematic diagram of the present invention, showing the gear transmission mechanism.

[0045] Fig. 9 yes Figure 5 Another structural schematic diagram in the figure shows the drill tube and related parts.

[0046] Fig.10 yes Fig. 9 A cross-sectional view of the combined structure of the drill barrel and ore conveying mechanism is shown in FIG.

[0047] Fig.11 It is another structural schematic diagram of a part of the present invention, showing the ore conveying mechanism. DETAILED DESCRIPTION

[0048] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0049] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Combination Figures 1 to 8 A seabed mineral sampling drilling device for extreme environments includes a power mechanism 1, a gear transmission mechanism 2, a drill tube 3 and an ore conveying mechanism 4. The gear transmission mechanism 2 includes a gear box 21, a driving gear 22, and a driven gear 23. The driving gear 22 and the driven gear 23 are both arranged inside the gear box 21, and the driving gear 22 and the driven gear 23 are meshed with each other.

[0052] The gear box 21 includes a top plate 211, a bottom plate 212 and an annular side plate 213. The annular side plate 213 is a closed cylindrical structure. The top plate 211 and the bottom plate 212 are respectively located at the openings at the upper and lower ends of the annular side plate 213. The edges of the top plate 211 and the bottom plate 212 are respectively fixedly connected to the upper and lower ends of the annular side plate 213 to form a whole.

[0053] Specifically, a lower mounting hole is opened on one side of the bottom plate 212, an upper mounting hole corresponding to the position of the lower mounting hole is opened on the top plate 211, and the position of the driven gear 23 in the gear box 21 corresponds to the upper mounting hole and the lower mounting hole.

[0054] A flange seat 214 connected to a seabed mining vehicle or a lifting device installed on a mining ship is fixed to the lower surface of the bottom plate 212. The flange seat 214 is coaxially arranged with the lower mounting hole, and its outer side wall is fixedly welded to the bottom plate 212 via a plurality of ribs 215.

[0055] An annular support 216 is disposed on the inner side of the lower mounting hole, and the outer side wall of the annular support 216 is fixedly and sealedly welded to the bottom plate 212 .

[0056] The driven gear 23 is an outer gear ring, which is located above the annular support 216. A slewing bearing 217 is provided between the annular support 216 and the driven gear 23, and the annular support 216 is used to fix and install the slewing bearing 217.

[0057] The inner ring of the slewing bearing 217 is fixedly connected to the annular support 216 , and the driven gear 23 is fixedly connected to the outer ring of the slewing bearing 217 . The driven gear 23 is installed in the gear box 21 and rotates relative to the gear box 21 . The driven gear 23 rotates with the gear box 21 through the slewing bearing 217 .

[0058] The drill barrel 3 is arranged vertically below the other side of the gear box 21, and its upper end passes through the driven gear 23 and extends to the outside of the gear box 21. The upper part of the drill barrel 3 is fixedly connected to the driven gear 23, and the driven gear 23 drives the drill barrel 3 to rotate around its central axis.

[0059] A connecting sleeve 5 is provided between the driven gear 23 and the drill barrel 3. The connecting sleeve 5 is a cylindrical structure, which is sleeved on the upper outer side of the drill barrel 3 and fixedly connected thereto. At the same time, the slewing bearing 217 supports and limits the driven gear 23 and the connecting sleeve 5 in the vertical direction to prevent the connecting sleeve 5 and the drill barrel 3 from falling out of the bottom of the gear box 21.

[0060] Specifically, six rectangular flat keys 31 are provided on the circumferential outer wall of the upper part of the drill tube 3, and the plurality of flat keys 31 are evenly arranged on the circumference of a circle with the axis of the drill tube 3 as the center. The inner side wall of the connecting sleeve 5 is provided with key slots 51, which are equal in number to the flat keys 31 and correspond in position to each other. There are six key slots 51, and each flat key 31 is located in the corresponding key slot 51. The drill tube 3 is fixedly connected to the connecting sleeve 5 at the position of each flat key 31 by a group of bolts.

[0061] The outer wall of the connecting sleeve 5 is fixedly connected to the inner side of the driven gear 23 by a plurality of bolts arranged in a ring shape. The power mechanism 1 drives the driven gear 23 to rotate through the driving gear 22 , and the driven gear 23 rotates synchronously with the drill tube 3 through the connecting sleeve 5 .

[0062] A first sealing ring 61 is disposed inside the annular support 216 , and the lower portion of the connecting sleeve 5 is rotatably sealed with the gear box 21 through the first sealing ring 61 , thereby achieving sealing between the lower portion of the connecting sleeve 5 and the bottom of the gear box 21 .

[0063] A first bearing seat 218 is disposed inside the upper mounting hole, and an outer wall of the first bearing seat 218 is fixedly sealed and welded to an inner wall of the upper mounting hole of the top plate 211 to form a whole.

[0064] The upper outer wall of the connecting sleeve 5 is rotatably matched with the first bearing seat 218 on the gear box 21 through a deep groove ball bearing 219. A first annular end cover 230 is arranged above the first bearing seat 218. The first end cover 230 is fixedly connected to the upper surface of the first bearing seat 218. The inner ring of the deep groove ball bearing 219 cooperates with the step of the outer wall of the connecting sleeve 5, which supports and limits the connecting sleeve 5 to move upward along its axis, and resists the reaction force of the ore on the drill barrel 3 during drilling.

[0065] A first O-ring 62 is embedded in the bottom surface of the first end cover 230 , and the first end cover 230 is sealed with the first bearing seat 218 via the first O-ring 62 .

[0066] A second sealing ring 63 is provided on the inner side of the circumference of the first end cover 230, and the upper part of the connecting sleeve 5 is rotatably sealed with the gear box 21 through the second sealing ring 63 to achieve sealing between the upper part of the connecting sleeve 5 and the top of the gear box 21, and the gear box 21 is filled with lubricating oil through the oil plug located at the top thereof.

[0067] The power mechanism 1 is located on one side above the gear box 21, and its output end driving gear 22 is key-connected. The power mechanism 1 drives the driven gear 23 to rotate through the driving gear 22. Specifically, there are two driving gears 22, and the two driving gears 22 are adjacently arranged at intervals on the outer side of the circumference of the driven gear 23. Both driving gears 22 are meshed with the driven gear 23. The axle of the driving gear 22 is in rotational sealing cooperation with the gear box 21 to ensure the airtightness of the inside of the gear box 21 and prevent oil leakage.

[0068] Second bearing seats 71 corresponding to the position of the driving gear 22 are respectively arranged on the top plate and the bottom plate of the gear box 21 , and the inner side of each second bearing seat 71 is rotatably matched with the axle of the driving gear 22 through a cylindrical roller bearing 72 .

[0069] A sealing cover 73 is fixed to the bottom of the second bearing seat 71 located below, and a third sealing ring 64 is provided between the sealing cover 73 and the second bearing seat 71 located below.

[0070] A second annular end cover 74 is fixed to the top of the second bearing seat 71 located above. The inner side of the second end cover 74 is movably sealed with the axle of the driving gear 22 through a lip seal ring 65, and the bottom of the second end cover 74 is sealed with the second bearing seat 71 located above through a second O-ring 66.

[0071] A power mechanism 1 is provided above each driving gear 22 , and the power mechanism 1 includes a hydraulic motor 11 , a planetary gear reducer 12 and a coupling 13 arranged in sequence from top to bottom. The upper end of the axle of the driving gear 22 passes through the top of the gear box 21 .

[0072] The output end of the hydraulic motor 11 is connected to the input end of the planetary gear reducer 12, and the output end of the planetary gear reducer 12 is keyed to the upper end of the axle of the driving gear 22 through the coupling 13. The output ends of the two hydraulic motors 11 rotate synchronously, and the two driving gears 22 are meshed with the driven gear 23 and finally drive the drill tube 3 to rotate around its axis, thereby completing the sampling of seabed ore drilling.

[0073] Furthermore, the lower end of the drill tube 3 is regularly arranged with a plurality of picks 33 for crushing ore, and the picks 33 are made of cemented carbide, and the outer surface thereof has a high-hardness metal ceramic layer, which has high hardness, good toughness, and strong wear resistance and impact resistance. Specifically, a planar three-pronged pick mounting seat 32 is arranged on the inner side of the lower end surface of the drill tube 3, and the three ends of the pick mounting seat 32 are fixedly connected to the inner wall of the drill tube 3 as a whole.

[0074] A portion of the picks 33 are evenly mounted on the lower end surface of the drill tube 3 in a ring shape, and another portion of the picks 33 are regularly distributed on the pick mounting seat 32 .

[0075] The ore conveying mechanism 4 is arranged on the inner side of the lower part of the drill tube 3, and comprises a roller cutter support 41 and two tearing roller cutters 42. The circumferential outer wall of the roller cutter support 41 matches the inner wall of the drill tube 3, and the roller cutter support 41 is fixedly connected to the drill tube 3 by bolts.

[0076] The roller support 41 has a conveying channel 411 that passes through from top to bottom. The conveying channel 411 is in a trumpet shape that is narrow at the top and wide at the bottom. The upper end of the conveying channel 411 is square and the lower end is round. The bottoms of the two tearing rollers are close to the upper end of the conveying channel.

[0077] Two shredding cutters 42 are arranged in parallel at the upper end of the conveying channel, and the two shredding cutters 42 rotate synchronously to continuously convey the crushed ore at the bottom of the drill tube 3 upward. Specifically, the shredding cutters include a cutter shaft 421 and a group of blades 422, and a group of blades includes a plurality of blades 422 arranged at intervals along the axial direction of the cutter shaft 421, each blade 422 is fixedly connected to the cutter shaft 421 where it is located, and the two groups of blades 422 are arranged alternately in sequence.

[0078] Both ends of the cutter shaft 421 respectively penetrate into the roller cutter support 41 and rotate with it. One end of each cutter shaft 421 is respectively connected to a motor enclosed in the roller cutter support 41, and the motor drives the two shredding rollers 42 to rotate synchronously.

[0079] The drill barrel 3 rotates under the driving action of the gear transmission mechanism 2, and the cutting teeth 33 at the lower end thereof drill the ore on the seabed to crush it. As the drill barrel 3 drills downward continuously, the crushed ore continuously enters the interior of the drill barrel 3, and the crushed ore inside the drill barrel 3 moves upward relative to the drill barrel 3 and enters the conveying channel 411 at the lower part of the cutter support 41. The two tearing cutters 42 rotate relative to each other under the driving action of the motor, and convey the crushed ore in the conveying channel 411 from bottom to top. At the same time, larger ore can also be crushed and conveyed. The crushed ore is continuously conveyed to the part of the drill barrel 3 located above the tearing cutters 42, and continuously moves upward along the drill barrel 3, enters the conveying pipeline installed on the top of the gear box 21, and is conveyed upward and reaches the collecting device, so as to realize the sampling of the seabed mineral deposits. The sampling drilling equipment of the present invention will not damage the non-sampling part of the seabed, and has little impact on the surrounding environment of the seabed.

[0080] Parts not described in the present invention can be implemented by adopting or drawing on existing technologies.

[0081] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0082] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A seabed mineral sampling drilling device for extreme environments, comprising a power mechanism, a gear transmission mechanism, a drill tube and an ore conveying mechanism, characterized in that: The gear transmission mechanism includes a gear box, a driving gear, and a driven gear, wherein the driving gear and the driven gear are arranged in the gear box and mesh with each other; The power mechanism is located on the upper side of the gear box, and its output end is connected to the driving gear key. The power mechanism drives the driven gear to rotate through the driving gear; The drill tube is arranged vertically below the other side of the gear box, and its upper end passes through the driven gear and extends to the outside of the gear box. The upper part of the drill tube is fixedly connected to the driven gear, and the driven gear drives the drill tube to rotate around its central axis. The lower end of the drill tube is regularly arranged with a plurality of picks for crushing the ore, and the ore conveying mechanism is arranged on the inner side of the lower part of the drill tube, which includes a roller cutter support and two tearing roller cutters, and the roller cutter support has a conveying channel that passes through from top to bottom; Two shredding rollers are arranged relatively parallel to each other at the upper end of the conveying channel. The two shredding rollers rotate synchronously to continuously convey the crushed ore at the bottom of the drill tube upwards. The gear box includes a top plate, a bottom plate and an annular side plate, and the top plate and the bottom plate are fixedly connected to the annular side plate to form an integral whole; A lower mounting hole is provided on the bottom plate, an upper mounting hole corresponding to the position of the lower mounting hole is provided on the top plate, a flange seat is fixed on the lower surface of the bottom plate, the flange seat is coaxially arranged with the lower mounting hole, and its outer side wall is fixedly welded to the bottom plate through a plurality of ribs; An annular support is provided on the inner side of the lower mounting hole; A connecting sleeve is provided between the driven gear and the drill tube, and the connecting sleeve is a cylindrical structure, which is sleeved on the outer side of the upper part of the drill tube and fixedly connected thereto; The outer wall of the connecting sleeve is fixedly connected to the inner side of the driven gear by a plurality of bolts arranged in a ring shape, and the driven gear drives the drill tube to rotate through the connecting sleeve; A first sealing ring is arranged on the inner side of the annular support, and the lower part of the connecting sleeve is in rotational sealing cooperation with the gear box through the first sealing ring; A first bearing seat is arranged on the inner side of the upper mounting hole, and the outer side of the first bearing seat is fixedly connected with the top plate to form an integral whole; The upper outer wall of the connecting sleeve is rotatably matched with the gear box through a deep groove ball bearing, and a first annular end cover is arranged above the first bearing seat, and the first end cover is fixedly connected to the first bearing seat and sealed with the first O-ring; A second sealing ring is provided on the inner side of the first end cover, and the upper part of the connecting sleeve is rotatably sealed with the gear box through the second sealing ring; A plurality of rectangular flat keys are arranged on the circumferential outer wall of the upper part of the drill tube, and the plurality of flat keys are evenly arranged on a circumference with the axis of the drill tube as the center; The inner side wall of the connecting sleeve is provided with key slots equal in number to the flat keys and corresponding in position to each other, each flat key is located in the corresponding key slot, and the drill tube is fixedly connected to the connecting sleeve at the position of each flat key by a group of bolts; The circumferential outer wall of the hob support matches the inner wall of the drill tube, and the hob support is fixedly connected to the drill tube by bolts; The conveying channel is in the shape of a trumpet that is narrow at the top and wide at the bottom. The upper end of the conveying channel is square and the lower end is round. The bottoms of the two tearing rollers are close to the upper end of the conveying channel. The shredding roller comprises a cutter shaft and a group of blades, wherein the group of blades comprises a plurality of blades arranged at intervals along the axial direction of the cutter shaft, each blade is fixedly connected to the cutter shaft where it is located, and the two groups of blades are arranged alternately in sequence; The two ends of the cutter shaft are respectively inserted into the roller cutter support and rotate with it. One end of each cutter shaft is respectively connected to a motor enclosed in the roller cutter support, and the motor drives the two shredding rollers to rotate synchronously. There are two driving gears, which are respectively arranged outside the circumference of the driven gear, and the axle of the driving gear is in rotational sealing cooperation with the gear box; A power mechanism is provided above each driving gear, and the power mechanism includes a hydraulic motor, a planetary gear reducer and a coupling arranged in sequence from top to bottom, and the upper end of the axle of the driving gear passes through the top of the gear box; The output end of the hydraulic motor is connected to the input end of the planetary gear reducer, and the output end of the planetary gear reducer is connected to the upper end of the axle of the driving gear through the coupling.

2. The device for sampling and drilling seabed mineral deposits in extreme environments according to claim 1 is characterized in that: The outer side of the annular support is fixedly connected to the bottom plate; The driven gear is an outer gear ring, which is located above the annular support; A slewing bearing is arranged between the annular support and the driven gear, the inner ring of the slewing bearing is fixedly connected to the annular support, and the driven gear is fixedly connected to the outer ring of the slewing bearing.

3. The seabed mineral sampling drilling device in extreme environment according to claim 1 is characterized in that: A plane three-pronged pick mounting seat is arranged on the inner side of the lower end surface of the drill tube, and the three ends of the pick mounting seat are fixedly connected to the inner wall of the drill tube as a whole; A part of the picks are evenly mounted on the lower end surface of the drill tube in a ring shape, and another part of the picks are regularly distributed on the pick mounting seat.

4. A seabed mineral sampling drilling device for extreme environments according to any one of claims 1 to 3, characterized in that: The top and bottom of the gear box are respectively provided with second bearing seats corresponding to the positions of the driving gears, and the inner side of each second bearing seat is rotatably matched with the axle of the driving gear through a cylindrical roller bearing; A sealing cover is fixed at the bottom of the second bearing seat located below, and a third sealing ring is provided between the sealing cover and the second bearing seat located below; A second annular end cover is fixed on the top of the second bearing seat, the inner side of the second end cover is movably sealed with the axle of the driving gear through a lip seal ring, and the bottom of the second end cover is sealed with the second bearing seat located above through a second O-ring.

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